Electric welding-machine.



E. J. VON HENKE. ELECTRIC WELDING MACHINE.

APPLICATION FILED MAYH. IBI?. 1,266,084. Patented Mayu, 1918.

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Patnted May 14, 1918.

UNITED STATES PATENT OFFICE EDMND J'. von HENKE, 0F LYNN MASSACHUSETTS, ASSIGNOR T0 THOMSON' ELECTRIC WELDING COMPANY, OF LYNN, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

ELECTRIC WELDING-MACHINE.

the construction embodyprovide complete protectionV together with' compactness and accessibility y incasing the parts and mounting them on or ina sec# tions! casing in .the manner hereinafter more particularly described. v

othenfeature of my invention `relates to the constructionV of atwo-turn secondary for the incased transformer in such manner that the casing thereof shall' form a part of the secondary. Inthis manner the weight is lessened so that in the smaller sizes'especially the machine is readily portable andmay be easily carried about by the operator.

. The oompactness of :the machine as a whole also enhances its ort-ability.

The invention urther relates to'the provision of anautomatic stop for the movable platen adapted to hold the same in retracted prsition combined with means cooperating with said stop -and adapted to withdraw the sanc automaticallyr by the act of closing the4 primary .circuit forthe purpose of starting the welding operation.

To the aboveends the invention consists in the construction of devices and combina tion of parts as hereinafter more particularlyV described and then specified in thel claims.

In the accompanying drawingsmy nvention is shown embodied in one of. the forms which it'maj7 take in practice. 'A

,Figure 1 1s a frolnt elevation of the .appa ratus. i Y

Specification of Letttzs Patent. application mamy 14, mi?. serial no. 168,331.

and suitable workholding ferably nevert Patented May 14, 1918.

Fig. 2 is a rear the casing `carrying the secondary and switches lookingjnto said section.

Fig. 3 is an elevation of the other section of t e casing carrying the primary coil turned bottom side up and. looking into said section of casing.

Fig. 4 is a section on the line -1-4 of'Fig. `1 (a so li 4-4 of Fig. 2) looking in the direction .o the arrow. 7

Fig. 5 is a section on the line 5 5 of Fig. 4 and also Fig. 1 looking vin the ydirection of the arrow.

elevation of, the section of' Fi 6 shows in detail one of the clamps for t eV welderwithits operating cam.

Fig. 7 is a partial section through the rear "portion ofthe spriug4operated platen carrymg one'of the two sets of workholding clamps.

8 is a detail vertical section through Fi the evices'which operate upon theY stop or Acatch for the movable plate Fig. 9 is a perspective view of said catch showing its relation to an adjustable stud or' screw for the platen. y

1 indicates the front and 1 the rear section of the casing. Said casing is constructed preferably of some good` conducting and non-magn'etic material at least es to its front half 1, which com rises apart ofthe twoturn secondary o the `transformer. ,One of the sections, as for instance the rear half, is Yfurnished with a proper to form a good joint where the ledges* of the sections Ht together.

The workholding platens or Vslides furnished with the proper workholders forl the welding or other .operation are indicated respectively at 3, 43. These platens fwqrk in guides 4, 4 constructed and insulated in the usual manner,the' guides 4 for the laten 3, which latter is the platen Which sli es in the welding or other operation, erably furnished with ball-bearing guides as indicated in Fig. 8, and the guideg--for the platen 3 which is ordinarily not employed 1n the weldin operation but which is refeless made adjustable,

lip or flange 2- being prefv eine4 plain guides as shown in Fig. 5. The platens are mounted on the exterior section 1 of the casing as shown. i I

. 6 indicates the handles used for operating the workholding clamps or jaws. 'is an arm or handle projecting from the platen 3 and used for retractin the same'afterthe completion of the we ding' operation"Y and,

when it is desired to place 1t in position for insertion of a new piece of work-in the clamps.

7 indicates the iexible laminated lead' f the secondary suitably attached, as shown", to

platen 8, and 7 the corresponding lead for` the platen 3', these leads beingl the terminal sections of the two-turn or ot er secondary i usually employed in this class of apparatus.

`13. 14 indicatesV an adjusting screw for adj usting the position of the lower jaw with respect to the lower jaw on 'the opposite side. As shown, said jaws are pivdtally mounted on the platens. An adjiitmnt for' the upper 'jaw with relationto its operatix' cam 11 is' provided by `a screw 16 engag with the wear plate 15 and adapted toV change the position of `thel wear plate` upon an inclined way or ide on the upper por tion 'of -said jaw. y this construction a 'very accur te adjustment of the clamping jaw is 4atta ned-to insure a good flat contact' of the jaw with the work. v

The laminated core of the transformer is madepreferably in two parts.. 17 ,s 17'; which meeton the lineu18 when the two sections of casing are secured together. Preferabliyy and as shown, the largerisection of thecore is mounted on the rear portion 1 of thei'casin and the smaller sectipn 17 on the front ha for section 1 which/carries 'the switches used in ther. operation of the'apparatus as will be presently described.

19 indicates the primary coils (if the transformer and 20 indicates the mounting for l the section"17 of the core. Saidmounting and section 'are fastened in place on the inside of the front half of section 1 "of the casi ng by means of the screws 22 which enter bosses 21 as shown or in any other suitable manner. 24 indicatesv the mounting for the section 17 of the core and 23 the screws by which said section is fastened to the inside Y of the rear half or section 1 of the casing.

.the section of casing The two sections of casin with the parts mounted thereon may be asteued together by means of the screws 26 passin from the exterior of the rear half through t Ve insulating fiber bushings 25, into holes tapped in the mounting 20, or said'halves or sections` may befastened together by any other suitable means permitting them to be readily detached from one another withthe parts carried by'said sections in place therein.

j The secondarysupplying the heating current for the work comprises two 4bars 27 the opposite endsrespectively of which are secured to and in electrical connection with thesection 1 of casing so that said casin will form a part of the secondary itsel whereby the two"v bars are combinedy into a two-tum secondary. The remaining ends, l

of said bars are respectiyely'connectedyto the leads 7, 7'. In order to form a electrical connection between the ends o the bars 27 and the casing, said endsare preferablyenlarged'as shownat '27 and copper gauze or other suitable ductile and com ressible' conducting material -s inte beood l tween the meeting surfaces of said eads and the section 1 of casingwhereb 'on'setting up the screws 28 which hold to the insideof the casing, good and firm electrical connection will be made for the joint'in the secondary circuit at this point. 29 indicates screws b which the ends of the bars are mechanical secured together to form a firm and rigid dientes a. plate'of insulation interposed between the abutting endsof said bars to insulate them from one another at this point, suitable insulating bushings being also pro'- ,vided for the screws 29 for the same purpose.

Screws 31 fasten the flexible leadsto the op posits ends of said bars respectively.

structure and 30 in- As will bessen, by this means the two are combined with the section 1 of the'casin into a two-turn secondary whose circuit,

fo lowing back from lead 7, for instance, is through upper bar-27, Fig. 2, to and through lower bar 27 to the opposite lead 7".

1 and then'th-rough 33 indicatesa secondary 'coil mounted on a section of transformer` secured within the section 1 of casin ',*sad coilv 33 being tbe usual auxiliary eo whichsu'ppliecurrent ,l .forthe magnetforf-the automatic cut-of switch. The insulated lead through-which alternating current is supplied tothe apparatns is indicated at 34,while 35 indicates' theinsulating ortion of n. connecting board `36 a contact p atev ofsaid connecting boar( and 37 a plu-g thereof, said connecting board.

being mounted .upon'thc section 1 and ,be.

ing providedwith a suitable series of plates adapted for coperation with, plug 37 to enable the connections to be formed at will, or as may be desired and as usual in this and other electrical apparatus..

vthe action of its spring 38 and 3U indicate respectively a casing for the two members of aplug switch by means oi' which the primary circuit is continued from the parts mounted on the section l of the casing to the control switches mounted within the section l and used in the welding and other operations vfor starting the action and automatically stopping it when the platen 3 has moved forward under or other operating contacts projecting ping switch and in the section 38 means. 4U indicates the from section 39 of the adapted to enter openings and engage contacts therein in the usual manner, thereby-to complete the connection after the two sections 1, 1 are secured together and in obvious manner.

The operating magnet for the automatic cut-ofi' switch of the apparatus indicated at 41 is mounted within the section 1, said magnct being supplied with current from the auxiliary coil 33 in the usual way. The armature 42 of the magnet is rovided with a suitable catch, as shown, aptedto be engaged by an arm or lever 43 so long as the armature 42 is retracted. The arm 43 Visa circuit closing and breakin arm of the automatic switch and. closes aireak ofthe primary circuit by engaging. a spring 44 for ing a art of said about by the operatioi button 45 or other operating*meansaswell understoodin the. art. f The circuit closing arm l47 operated by starting button 46 closes another breakin the primary circuit by en? thereby .places the"- gaglng spring: 44zand i primary `circuit in condition :for circulatlon A of the primarycnrrent through the primary to close, circuit when the platen is coil 19, thereby rgenerating current in the 'secondary for heating the workin the clamp- 1n Jaws. e

hen the m mary circuit is roken by the release s111143 and the 'flow of vheating.current stops. f1tmay alsoibe ,stoppedat-.any timev by-'releas-l lng pressure onthe starting-button46." 'The operation of the magnet 41 is` brought about 1n the usual way by the closure of its circuit by means of a circuit closer carried by an arm 9 of the movable platen 3 and adapted p crmltted to move forward through the heating of the work. v.When the platen 3 is moved backby hand for insertion of anew piece offwork, it isheld retracted by an automatic :catch be engaged by,' thc..end 55 cf'a screw- 54 rear of the vided with a suitable set nnt 56. The head 53 of the catcl'is mounted `npopastem 50 and is suitably opera-ted in ing to force the head 53 of ithecatch into positlonto be engaged bythe end of screw 4slot 51 in the stem 50 for the automatic stop.

.1s moved back thel catch antomatical circuit when said arm is i latche up, its hitched position beingbrought 1 of the manual push-A means such as the aigneitl isenergizedr-'saidprii y Aused as a portable Welder the the head ofwlnch` 53, passes into position to platen and profone direetionby means of the coil spring 52 normally tend` 5l. lVhen the platen is drawn back by hand the stop or catch slips into position to hold it retracted. The stop or catch is withdrawn automaticallyr so that the platen is ready to move forward under the action of its spring. To etl'ect this I provide means coiiperating with the means or closlng the primary circuit and employed to start the welding or other operation. iVhilc sani means might be applied to or associated with either bf the means for closiu the break iu the primary circuit, I pre er to combine thenl with the button I5-which operates on the circuit closing and breaking switch 43.

A simple construction of device adapted for this use4 comprises the stem 49 seated in a suitable opening in the bracket or plate 48 which carries the switch parts and normally held in raised position by a spring 60. Said stem or rod 49 is engaged by lever 43 so as to be depressed when the lever is raised to close the circuit and is provided with a cam or incline on its lower end where it enters a As will be obvious, when the stem 49 is de-l pressed, it withdraws the catch 53 and leaves the platen 3 free4 to move. When the laten y enbeing After ages 'and holds it while the work is 'inserted andclamped in the jaws. I

v-the work isinsertedthe Voperation is started f by closing the primary circuit, in which act the operatlon of re-settng the automatic switchv to close the break ,in the lprimary automatically withdraws the catch or stop to` leavethe platen free for the action of-` the spring 10 which moves it,

forward.V K y Fromthe above description it will be seenv that the secondary circuit with the necessai-y switches and pushbuttons is complete 'in itself asa'unit while the primary and the switches lor connecting devices which it may be desired to use, constitutes another xunit, and that by simply placing the two sections of the apparatus together 4the connections are established whereby the apparatus as a whole .is put into operative electrical.condi tion, theV sections being held together b the screws 26 or other means employed4 for liold ing the two sections land 1' of 4the casing to ether.

l0 indicates a strap or hanv erbyV which the apparatus may be suspen y strap y70fmay` be passed around the neck of theofperator and thus be carried about.v

As will be seen, I secure great compactness of the apparatus as a portable electric welder or other'electric metal working de- In addition, parts such as the. auto` matic switches, etc.. are well protected from dirt or accidental derangement while at the same tune maximum accessibility is secured.

ed and when 120 What I claim as militnvention is A 1. 'In a metal wor ng apparatus, an incased transformer having 'a two-turn secondary embodying a pair of conductors the opposlte ends of which respectively are secured to and in electrical connection with the casing.

2. In an electric metal working apparatus havin secon ary for the said transformer comprising two substantially parallel bars the opposite endsof which respectively are secured to and in electrical connection with the casing, and flexible leads fastened to the remaining ends. f

3. In an electric metal working apparatus, an incased transformer the secondary of which comprises two parallel metal bars or.

rods the opposite ends of whichreslpectively have enlarged heads fastened to an in electrical contact with the casing and likewise fastened to but'ins'ulated from the remain-` ing emis- 1 4. In an electric metal working apparatus, a casing forming apart of the secondary circuit and a secondary bar within the cas ing fastened thereto and having an interposed copper or other goodconducting gauze between the-contacting surfaces of the secondary bar and casing.

5. An electric metal working apparatus provided with a transformer, andV a sectional casing therefor,l the-core of said transformer.

being made in sections secured respectively to the casing sections as and for the purpose described.

6. An electric metal working apparatus having an incased transformer, said casing being Vmade in section one of which carries the primary and. the otherl a secondary of said transformer. Y j

7. An electric metal working a paratus havin an incased transformer an a magnetica ly controlled switch for the primary of the transformer, said casing being made in sections within one of which the primary is mounted, the secondary and switch controlling magnet being mounted within the other section.

8. In an'electric metal working apparatus, a sectional casing for the'transformer one section of which casing is provided with workholders mounted on its exterior and has mounted within it a secondary ba'r whose circuit Ais completed through the transformer casing', an automatic switch magnet and a section of transformer core provided with an 'auxiliary secondary coil rfor operat-.

ing said switch magnet. r

:9. In an electric metal workin apparatus, a sectional casing one section o w lch carries within it the vautomatic switch for the primary and operating magnet for said switch together with a section of a transb former tore and auxiliary coil mounted an incased transformer, a two-turn l the metal are mounted respectively on the sections of `casing and 'are ada ted to connect the primary circuit throng the contacts of the automatic switch.` y

l10. In an electric metal working apparatus, an incased transformer the primary and a portion of the core of which are mounted within one sectionv of a sectional casing while the secondary and 'remaining portion of the core are mounted within the-other a s section, said seconda having its circuit completed through said section and being connected to workholders mounted on the exterior of said section. A

11.\In an electric metal working apparatus, a sectionalcasing for the transformer and operating or controlling parts of the apparatusr having a secondary with necessa switches and push-buttons mounted wit in one. section an forming a unit completc in itself, separable from the other section containing the prima coil and the connecting board' to which vt e primary circuit leads are joined.. 12. In an electric metal working apparatus having an incased transformer, a pair 95 .of secondary bars forming the elements of a two-turnsecondary, said bars being attached res ectively at their op osite ends to 'c casing and in ectrical connection therewith and being likewise secured to but insulated from the remaining ends to which the leads running through the workholders are secured, A

13. In an electric metal working apparatus, a sectional casing one section of which carries outside the workholding p la'tens and within it the automaticand4 manual switches and secondary of the transformer, together with a section of the core, while the remaining-section of the casing carries the balance 110 of the. coreand the primary. 4

14. In an electric' metal wor ap aratus, the combination with a mova le p aten anda catch adapted to hold the samein retracted position, of means for ,closing a break inthe primary circuit of the trans' former and simultaneously and automatically freeing the platen'from the catch. l

15. The combination in an electric metal working apparatus, Iof a sprin actuated platen;a catch adapted to hold e same inretracted position, an automatic switch, resetting means therefor and'l means coperating with the re-setting means to o rate the catch and free the p aten when t e switch is ive-set.

16. In an electric metal workin ap aratus, the combination with a movab e p aten, of 4an automatic stop adapted to hold the platen in retracted position, means for closinf: thc stnrting circuit and means coperating will: the lutter to free the stop es and for the purpose (lescribefl.

17. 1n un electric metal working apparatus, the emnbinntion of n platen, a catch therefor, :L release switch, means for resetting the lutter :unl copernting means for wtlnlrnwing .said catch when the release switch is reset.

18. In un electric metal workingr appuratns, u sectional casing one section of which carries the platen on its outside and hns the automatic and manual switches mounted within it together with the secondary of a. transformer whose circuit embraces the calsing, the other section of said ensin r having mounted upon it the portion of tile tramsformer core rnd the primary coil thereof.

V12). In nn electric metal working appuratns, n `w0rk-clnmping jnw, a pluie adjustable along un ine-lined plane finned on said jaw und n jim-operating cnrn engaging said plete.

2U. In un electric metal working apparatus, n pivoled clamping jaw hminp; n work engaging surface :unl n. surface inclined thereto, u pluie carried by said jnw and sented on suicl inclined surface, adjusting means for varying the posilion ol' said plate longitudinally on snid surluce operntin f cmu engn l'ing Suid pluieY Signe ut New ol-k in the county of New York :unl State of New York this 12th day of Muy A. l). 1917.

EDMUND J. von IIICNKE. Witneszes:

F. B. Townsnnn, Innm; Lericowrrz. 

